1. Introduction
The ANENG Digital Inclinometer (Models RN01, RN02, RN03) is a high-precision angle gauge designed for accurate measurement of angles, levels, and slopes. Featuring a digital display, strong magnetic base, and in some models, a horizontal laser, it is an indispensable tool for woodworking, construction, vehicle maintenance, and various industrial applications. This manual provides detailed instructions for the safe and effective use of your inclinometer.
Figure 1: ANENG RN03 Digital Inclinometer Overview
2. Safety Information
Please read and understand all safety warnings and operating instructions before using this product. Failure to do so may result in injury or damage to the device.
- Do not expose the device to extreme temperatures, humidity, or direct sunlight.
- Keep the device away from strong magnetic fields, except for its intended magnetic base.
- Handle the device with care to avoid dropping or impact, which could affect its accuracy.
- For models with a laser (RN03), do not stare directly into the laser beam or point it at others.
- Keep out of reach of children.
3. Product Overview
The ANENG Digital Inclinometer comes in three models with varying features:
- RN01: Digital protractor, powered by 2 x AAA 1.5V batteries (not included).
- RN02: Digital protractor, USB-C rechargeable with a built-in Lithium-ion battery.
- RN03: Digital protractor with a red laser, USB-C rechargeable with a built-in Lithium-ion battery.
All models feature a 0.05° accuracy, 360° measurement range, strong magnetic base, and an automatic screen flip function for easy reading in any orientation.
Figure 2: ANENG RN01 Key Features
3.1 Components and Controls (RN03 Example)
Figure 3: ANENG RN03 Product Parameters and Controls
- Charging Port (USB-C): For RN02 and RN03 models.
- LCD Backlit Display: Shows measurement values and modes.
- Power Switch / Laser Level Switch: Long press to power on/off. Short press to turn the laser on/off (RN03 only).
- H/% Key (Hold / Unit Switch): Single press to switch between angle (°) and slope (%). Long press to hold the current measurement value.
- ZERO Key: Short press to set the current position as the relative zero point. Short press again to restore absolute measurement.
- Horizontal Laser Output Port: Emits the laser beam (RN03 only).
4. Setup
4.1 Battery Installation (RN01 Only)
- Locate the battery compartment cover on the back of the device.
- Slide or open the cover.
- Insert 2 x AAA 1.5V batteries, ensuring correct polarity (+/-).
- Close the battery compartment cover securely.
Figure 4: RN01 Battery Installation
4.2 Charging (RN02 & RN03 Only)
The RN02 and RN03 models are equipped with a built-in 3.7V 350mAh lithium battery and a USB-C charging port.
- Connect the provided Type-C data cable to the inclinometer's charging port (1 in Figure 3).
- Connect the other end of the cable to a DC 5V output adapter (e.g., phone charger, computer USB port).
- The charging indicator light will be bright red during charging.
- The light will turn off when the battery is fully charged.
A full charge typically takes 2 hours and provides approximately 72 hours of continuous use.
Figure 5: USB-C Charging for RN02/RN03
5. Operating Instructions
5.1 Power On/Off
- Power On: Long press the Power button (3 in Figure 3).
- Power Off: Long press the Power button again. The device also features an automatic shutdown function after approximately 12 minutes of inactivity to conserve battery.
5.2 Measurement Modes
The inclinometer supports two measurement modes: Absolute and Relative.
Figure 6: Absolute vs. Relative Measurement Modes
- Absolute Measurement Mode: This is the default mode. The display shows the angle relative to the true horizontal (0°) or vertical (90°).
- Relative Measurement Mode: To enter relative mode, place the inclinometer on a surface you wish to use as your reference (e.g., 7.5° inclined plane). Short press the ZERO key (5 in Figure 3). The display will show 0.00°, indicating this new surface is now your reference. Subsequent measurements will show the angle relative to this new zero point. Short press the ZERO key again to return to absolute measurement mode.
5.3 Unit Switching
Single press the H/% key (4 in Figure 3) to switch the display unit between degrees (°) and percentage (%).
5.4 Data Hold
Long press the H/% key (4 in Figure 3) to hold the current measurement value on the display. Long press again to release the hold function and resume live measurement.
5.5 Horizontal Laser (RN03 Only)
For the RN03 model, short press the Power button (3 in Figure 3) to turn the horizontal laser on or off. The laser projects a red line to assist with alignment and marking.
5.6 Automatic Screen Flip
The inclinometer's display automatically flips when the instrument is inverted, ensuring the readings are always upright and easy to read from any angle.
Figure 7: Automatic Screen Flip Function
5.7 Magnetic Adsorption
The inclinometer features a strong magnetic base on all four sides, allowing it to firmly attach to metal surfaces for hands-free operation and convenient measurement.
Figure 8: Strong Magnetic Adsorption
5.8 Product Demonstration Video
Video 1: ANENG Digital Inclinometer Features and Usage Demonstration
6. Calibration
The instrument needs to be recalibrated if it has been affected by impact or temperature changes to ensure measurement accuracy. Follow these steps for proper calibration:
Figure 9: Calibration Steps
- Step 1: Turn on the instrument. Place it on a flat, horizontal surface. Long press the Power button and the H/% key simultaneously until 'CR.d1' appears and starts to flicker and beep.
- Step 2: While 'CR.d1' is flickering, rotate the instrument 180° on the same flat surface and lay it flat. Press the H/% key to confirm. 'CR.d2' will appear and start to flicker and beep.
- Step 3: While 'CR.d2' is flickering, rotate the instrument 90° and lay it flat. Press the H/% key to confirm. 'CR.d3' will appear and start to flicker and beep.
- Step 4: While 'CR.d3' is flickering, rotate the instrument 180° and lay it flat. Press the H/% key to confirm. 'CR.d4' will appear and start to flicker and beep.
- Step 5: While 'CR.d4' is flickering, place the instrument display screen horizontally down on the edge of the plane. Ensure that the button is suspended (not touching the surface). Press the H/% key to confirm. 'CR.d5' will appear and start to flicker and beep.
- Step 6: While 'CR.d5' is flickering, turn the instrument 180° as shown in the figure (display screen upwards) and lay it flat. Press the H/% key to confirm. 'CR.d6' will appear and start to flicker and beep.
- Step 7: Wait until the 'CR.d6' on the screen flashes and buzzes. Press the H/% key. The screen will display 'CR.d'. After about 3 seconds, the instrument calibration is completed, and it will enter normal measurement mode.
7. Applications
The ANENG Digital Inclinometer is a versatile tool suitable for a wide range of applications:
- Woodworking: Setting angles for table saws, miter saws, and other woodworking machinery.
- Construction: Measuring roof pitches, stair slopes, and ensuring level surfaces.
- Vehicle Maintenance: Checking wheel alignment and other automotive angles.
- DIY Projects: Installing cabinets, shelves, and other household fixtures.
- Industrial Maintenance: Precision instrument research and general angle measurement.
Figure 10: Multi-Scene Applications
Figure 11: Vehicle Underbody Inclination Measurement
Figure 12: Expressway Slope Detection
8. Maintenance
- Cleaning: Use a soft, damp cloth to clean the device. Do not use abrasive cleaners or solvents.
- Storage: Store the inclinometer in a dry, dust-free environment when not in use.
- Battery Care (RN01): Remove batteries if the device will not be used for an extended period to prevent leakage.
- Battery Care (RN02/RN03): Charge the device regularly to maintain battery health, even if not in frequent use.
9. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not power on | Low or dead batteries (RN01); Discharged battery (RN02/RN03) | Replace batteries (RN01); Charge battery (RN02/RN03) |
| Inaccurate readings | Needs calibration; Device was dropped or impacted; Strong magnetic interference | Perform calibration (Section 6); Avoid strong magnetic fields during measurement |
| Display shows 'Err' during calibration | Calibration steps not followed correctly | Repeat calibration carefully, ensuring correct orientation and button presses. |
| Laser not working (RN03) | Laser is off; Low battery | Short press Power button to turn on laser; Charge battery |
10. Specifications
Figure 13: Comparison of Functional Parameters
| Function | RN01 | RN02 | RN03 |
|---|---|---|---|
| Inclination Resolution | 0.05° | 0.05° | 0.05° |
| Inclination Accuracy | ± (0.5° + 5 words) | ± (0.5° + 5 words) | ± (0.5° + 5 words) |
| Tilt Rate Resolution | 0.05% | 0.05% | 0.05% |
| Tilt Rate Accuracy | ± (0.1% + 10 words) | ± (0.1% + 10 words) | ± (0.1% + 10 words) |
| Relative Value Measurement | ✔️ | ✔️ | ✔️ |
| Four-sided Magnetic Attraction | ✔️ | ✔️ | ✔️ |
| LCD Backlit Screen | ✔️ | ✔️ | ✔️ |
| Automatic Screen Flip | ✔️ | ✔️ | ✔️ |
| Data Retention | ✔️ | ✔️ | ✔️ |
| Calibration Function | ✔️ | ✔️ | ✔️ |
| Horizontal Laser | ❌ | ❌ | ✔️ |
| Lithium Battery Charging | ❌ | ✔️ | ✔️ |
| Battery Type | 1.5V AAA battery *2 | 3.7V 350mAh | 3.7V 350mAh |
| Material | ABS | ABS | ABS |
| Weight | 84g | 90g | 111g |
| Auto Power Off | If there is no operation after 12 minutes, the machine will be automatically shut down | ||
Note: The parameters are for reference only, and the actual measurement of the specific equipment shall prevail.
11. User Tips
No specific user tips from reviews or Q&A were provided for this product. However, general tips for digital inclinometers include:
- Always ensure the measurement surface is clean and free of debris for accurate readings.
- When using the magnetic base, ensure it is firmly attached to prevent slippage.
- For critical measurements, take multiple readings and average them to minimize potential errors.
- Keep the device away from extreme temperatures to maintain battery life and display functionality.
12. Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the contact information provided by your retailer or the manufacturer's official website. Keep your purchase receipt as proof of purchase.
